Appendix C. Thermistor Temperature Derivation; 3Kω Thermistor Resistance; Table 17: 3Kω Thermistor Resistance - Geokon GeoNet 8900 Series Instruction Manual

APPENDIX C.
DERIVATION
C.1 3KΩ THERMISTOR RESISTANCE
Thermistor Types:
■
YSI 44005, Dale #1C3001–B3, Alpha #13A3001–B3
■
Honeywell 192–302LET–A01
Resistance to Temperature Equation:
T =
EQUATION 1: 3kΩ Thermistor Resistance
Where:
T = Temperature in °C
LnR = Natural Log of Thermistor Resistance
A = 1.4051 x 10
B = 2.369 x 10
C = 1.019 x 10
Note: Coefficients calculated over the –50 to +150 C span.
Ohms Temp
201.1K -50
187.3K -49
174.5K -48
162.7K -47
151.7K -46
141.6K -45
132.2K -44
123.5K -43
115.4K -42
107.9K -41
101.0K -40
94.48K -39
88.46K -38
82.87K -37
77.66K -36
72.81K -35
68.30K -34
64.09K -33
60.17K -32
56.51K -31
53.10K -30
49.91K -29
46.94K -28
44.16K -27
41.56K -26
39.13K -25
36.86K -24
34.73K -23
32.74K -22
30.87K -21
29.13K -20
27.49K -19
25.95K -18
24.51K -17
23.16K -16
21.89K -15
20.70K -14
19.58K -13
18.52K -12
17.53K -11
16.60K -10
TABLE 17: 3KΩ Thermistor Resistance
MODEL 8900 SERIES GEONET WIRELESS DATA HOSTING SYSTEM | THERMISTOR TEMPERATURE DERIVATION | 29
THERMISTOR TEMPERATURE
1
–
3
A+B(LnR)+C(LnR )
–3
–4
–7
Ohms Temp Ohms
15.72K -9 2221
14.90K -8 2130
14.12K -7 2042
13.39K -6 1959
12.70K -5 1880
12.05K -4 1805
11.44K -3 1733
10.86K -2 1664
10.31K -1 1598
9796 0 1535
9310 1 1475
8851 2 1418
8417 3 1363
8006 4 1310
7618 5 1260
7252 6 1212
6905 7 1167
6576 8 1123
6265 9 1081
5971 10 1040
5692 11 1002
5427 12 965.0
5177 13 929.6
4939 14 895.8
4714 15 863.3
4500 16 832.2
4297 17 802.3
4105 18 773.7
3922 19 746.3
3748 20 719.9
3583 21 694.7
3426 22 670.4
3277 23 647.1
3135 24 624.7
3000 25 603.3
2872 26 582.6
2750 27 562.8
2633 28 543.7
2523 29 525.4
2417 30 507.8
2317 31 490.9
273.15
Temp Ohms Temp Ohms
32 474.7 73 137.2
33 459.0 74 133.6
34 444.0 75 130.0
35 429.5 76 126.5
36 415.6 77 123.2
37 402.2 78 119.9
38 389.3 79 116.8
39 376.9 80 113.8
40 364.9 81 110.8
41 353.4 82 107.9
42 342.2 83 105.2
43 331.5 84 102.5
44 321.2 85 99.9
45 311.3 86 97.3
46 301.7 87 94.9
47 292.4 88 92.5
48 283.5 89 90.2
49 274.9 90 87.9
50 266.6 91 85.7
51 258.6 92 83.6
52 250.9 93 81.6
53 243.4 94 79.6
54 236.2 95 77.6
55 229.3 96 75.8
56 222.6 97 73.9
57 216.1 98 72.2
58 209.8 99 70.4
59 203.8 100 68.8
60 197.9 101 67.1
61 192.2 102 65.5
62 186.8 103 64.0
63 181.5 104 62.5
64 176.4 105 61.1
65 171.4 106 59.6
66 166.7 107 58.3
67 162.0 108 56.8
68 157.6 109 55.6
69 153.2 110
70 149.0 111
71 145.0 112
72 141.1 113
17:
Temp
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150